Motor



Dec. 15, 1931. A MgP, HOLMES 1,836,249-

MOTOR orginal Filed Feb. "19, 1923 s TMa'r 6P me le?A Patented Dec. 15,1931 f unirnos-rares MonHIs r. HOLMES, or CLAHEMONT, NEW HAMPSHIRE,'essicfivon 'ro s'ULIQIvii.uV ita'- 'I CHINHRY'COMPANY, A CORPORATION onivIAssAoHUsnTms Moron `Origin-a1 application filed ebruary 19,

My invention relates to power actuating Y is-to provide an improved airmotor having spiral toothed intermeshing rotors which permit exhaustingvthe, `actuating' Huid at each end of the motor.` A. stillfurther objectis to provide `an improved arrangement of fluid conducting passages. Afurther ob ject is to provide an improved arrangement v.of passagesadapted to allow the discharge of exhaust fluid lfrom either side of themotor casing. vIt is to be understood that this motor is adaptedforgeneral .use but is especially constructed and so arranged as to be particularly useful in a mining machine ofV a type. adapted -toibedisposable in inverted positions. The usual operation of such a .machinerequires that one side Vor the other of the motor be brought adjacent acoal face ofthe mine in which it is working. Thus my improved passagearrangement permits proper exhaust of the'fluid regardless of `whichside of the motor is disposed adjacent the face. VA further-Objectis toprovide an improved "motor having an improved` ar-V rangement ofoperating-elements in order to obtain the highest maximum eiiiciencythere(- of. @ther objects include improved lubricating' mechanism*7`rotor construction, and fiuid controlling means. These and'other objectsand advantages of my invention will hereinafter more fully appear. Y. Inthe accompanying drawings lf shown for purposes of illustration one formwhich my invention may assume inpractice.

"in these drawings,` n V"Fig l is at transverse horizontal sectionthrough the improved motor. Y

Fig. 2 is a vertical longitudinal section Von line.`2-2 of Fig.` l,showing oneof the rotorsV in elevation. Y Y y. n Fig. 3 is a verticaltransverse. section on line 3 3 of Fig. 1.

have

1i23,Sera1-No. 619,839.` Divided and this application iledV January16,1925.l Serial No;2,911. i i

ofthe oilingmechanism. y in the particular embodiment of. myinventionillustrated in `the `present applica,-

tion which isadivisioirof my-copendi'ng ap- Vplication7 now matured intoPatentffNo.

1,670,155, patented `May 15, 19281liave shown a motor housing `8havingsuitably journaled therein a pairof longitudinally extendingdouble* helicalrotors [9, Alil-,preferably meshing as herein on the:longitudinal center line of the machine and.n housed in suitableYintersecting bores `11,-12'f`ormed in the Vsection 8; the rotorsQ, 1Qeach ,prefer ably having betweentheir oppositely disposed sets ofhelical teeth, a spur gear V1'?) meshing with its fellow. Moreparticularly lit will be observed that each of these rotors comprises aplurality of oppositely'disposed helical portions. 14C on oppositesidesof a spur gear and that these elements are clamped together byaplurality of bolts 15 carrying on their ends clamping ringsl'd engagingopposite vshoulders 17 on a shaft 18 to which oneof the helicaltoothsectionsislreye'das 1f at 19. 1n this-connection attention-isdh rectedto the fact thatas viewed'gin Fig. the right hand. helical section ofone `rotor keyed to one shaft while the leftha'nd?` secftion of theother rotor is` keyed .totheother shaft, in such manner as toenableii'dentical rotorsto beutilized on the: two .shaftsjlthe rotorsbeing simply opposit'elyifmouiited on the different shafts. It willfurther be noted that the shafts 18, have reduced portions adr .f

jacent their shoulders 17 which 4 ini-turn. are

supported `in motor head-4 memhersQO; 21 seated in the oppositeendsofthe casing and herein having iianges22V adaptedtoposition thesaine relative to theHcasi-ng, suitable ball bearings preferably'being.pro-vided between. further reduced portions4 24. oni the sliaftand theheads, It will also be noted that the-heads are disposed within' theends of the motor casing, thus providinganextremely compact Vmotorfurthe-rlpermitf ting the assemblage of frame elements of a miningmachine frame directly againstmthe motor housing edges.v 1

:Operatively associated with-,the rotors Fig.: 4 is an enlargedfragmentary detail Partnr fossi-cfs* y above described is improved meansfor supplying pressure fluid thereto and exhausting the same therefrom.Actuating fluid is admitted by a longitudinally extending passagepassing through suitable means to the head 21 through suitable packedjoints and extending longitudinally of the center line of the section 8beneath the mesh line of the rotors 9 and 10, to a point below the spurgear sections 13 where it communicates with a plain upwardly extending`motor inlet 26, thus supplying motive fluid to the rotors in such mauneras to cause the same and their shafts to rotate in a well known mannerin the opposite directions indicated by the arrows in Fig. 3. As shownherein, the exhaust from the rotors passes out of the opposite endsthereof into end exhaust chambers 27 communieatingl through bafflechambers 28 with outlets 29 disposed two in a set vertically at theopposite ends of each side of the motor sect-ion8,the baffles serving toprevent the entry of foreign matter such as coal into the rotor casingwhen the rotors draw a vacuum in the casing as the motor is shut down.Here attention is also directed to the fact that a longitudinalpassageway 30 is provided above the mesh line of the rotors connectingthe two end exhaust chambers. It is to be noted that the exhaustpassages are formed in the sides of the motor casing as distinguishedfrom the top and bottom and the ends thereof for the pur pose 'ofkeeping the overall height to a minimum.

Here attention is also directed to the coutrolling mechanism for thefluid pressure supply which is preferably provided in addition toanother usual valved supply connection. More particularly, it will beobserved that a hollow tubular throttle valve 31. having alongitudinally extending slot or aperture therein is j ournaled in thepassage 25 immediately beneath the motor inlet 26, this throttle valve31 being rotatable on a horizontal axis in such manner that rotation ofthe same acts to throttle more or less as desired the supply of pressurefluid from the passage 25 to the motor inlet 26. More particularly, itwill be noted that this valve 31 which is preferably so constructed asto be expanded by the fluid pressure in such manner as to resist aturning movement, is provided with a rod 33 extending in the oppositedirection from the passage 25 and through the head 20, and that this rodis journaled in the bottom of the motor casing 8 and the head 20 andcarries on a protruding end a pinion 34 which is adapted to mesh withsuitable means such as a 'transversely disposed rack member.

Cooperating with the motor mechanism is also improved lubricatingmechanism therefor. This mechanism herein comprises a plurality oflubricant chambers 3G, 3"?, formed in the frame of the motor casingSvabove the horizontal median plane thereof and a plu rality of similarlubricant chambers 38, 39 below that plane. Herein one of these chambers36 communicates with the bore for the rotor 9 through a small airpassage 40 and also through a restricted oil discharge 41 locatedadjacent the bottom of the chamber and controlled by a valve 42operatively connected, as through a. pin 43, with an adjusting` screw44, in turn operable by an adjust ing knob 45 disposed in a recess 46 inthe side of the casing S'substantially midway between the top and bottomthereof. Thus it will be noted that the construction is such that whenthe knob 45 is adjusted, the air pressure passing from the rotor chamberinto the chamber 36 and acting on the top of the oil therein forces theoil out through the aperture 41 and into the rotor chamber into thepressure fluid in such manner as to lubricate the rotor. Referring tothe cham er 37, it will be noted that the same is not provided with avalve but that instead the opening in which the member 44 would beseated is plugged by the plug 4T and that similar plugs close thechambers 33, 3f), this arising from the fact that. the chamber 3T isonly used when that side of the machine is away from the coal face andtherefore accessible, the plug 47 then closing the chamber 3G, whileythe chambers 38, 39 are only used under like circumstances when themotor is turned bottom side up and operating with the top surface shownin Fig. 3 forming its shoe, all as more fully described in my copendingapplication. Here it will also be noted that these chambers may befilled through removable two part screened plug connections 43, 49, 5()and 5l in both the top and bottom surfaces of the machine.

Suitable driving gearing` is associated with my improved motor andcomprises a spur gear 52 keyed to one of the rotor shafts 18 anddisposed adjacent. the head 21 while a second spur gear 53 is keyed tothe other rotor shaft 18 but disposed a slight distance from the face ofthe head 21. A. shaft 54 is rotatably mounted between or intermediatethe free ends of the rotor shafts 13 as by a roller bearing 55 disposedat one end while any suitable bearing could be used for the otherreduced end. Non-rotatably but longitudinally slidably mounted upon theshaft 54 is a spur gear 56 adapted to be alternatively engaged with thegears 52 and 53 as by any suitable shipper mechanism adapted to engage ausual collar 57. Disposed on the opposite end of the motor is additionalgearing comprising a pinion 58 meshing with a gear 59 keyed to a shaft60 rotatably supported at opposite ends in bearings 6l and 62 carriedrespectively by spaced supports and 64 forming a part of head 20. Thegear 59 is disposed between said supporting portions. A pinion G5 isformed on the outer end of the shaft G0 and adapted to be suitablydriven upon rotation of the rotors.

figseaefle y p Y i 2B Y :havingia centralportion of larger diameter thanthe-end portionsito formshoulders there- Y `'rbetweema' pluralityofspiral toothed sectionsrigid-ly Vsecured togethervand mounted on saidcentral portion, and locking-plates removably ,secured directly to saidsections and engaging said-'shoulders forf holding Vsaid rotor sec tionsonsaiddshafts.

T2. A pressure 1"fluid motor comprising a "frame'hav-ing plane -top and"bottoni walls,

-vertical side walls and'end walls, a pair of f `said reservoirs beingformed in one of the "i-utermeshingrotors mounted in saidframe iwiththeir axes disposed ina horizontal pla-ne fand their Jperipheriesextending to points y'closely adjacent the top and bottom of said frameand said vertical side walls being dis 30 4posed;parall'elto thevfrotoraxes,the heiobt D-- ofsaid'fra-me 'being Vonly that requisite for thepower producing elements, exhaust pasA sages formed in the sides of saidframe adjacent each end of the rotors and opening ffldirectly toatmosphere through thevvertical side walls of said frame whollyV withinthe y vertical limits of the latter, and rotor lubrieating meansincluding a lubricating reser- :voir formed in the sides ofvsaid framebe- 4'0 tween said exhaust passages.

3. In a pressure fluid motor, a casing hav ing parallel plane top andbottom surfaces upon either` of which the motor may be supported duringoperation, a pair of intermesh-V M0 ing rotors mounted in said casingwith their axes disposed in the same horizontal plane,

that requisite for the power producing elements and vertical side wallsarranged par- 350 Vallel to therotor axes, and reversely curved exhaustpassages constituting a trap vfor solid particles, said passages beingformed in th side walls of said casing.v u

\ 4. In a pressure fluid motor, a plurality of "'55 intermeshing rotorswith their axes disposed in a common horizontal plane, a motor casingenclosing said rotors whose height is substantially equal to thediameter of one ofsaidrotors plus twice the required thickness of themotor easing, the height of said motor casing being substantially'onlythat requisite to the power producing function of the motor, a pluralityof lubricant reservoirs one of which is disposed in one of the side *Hwalls and another of which is formed in the K motor, a plurality ofV'the motor may be supported during operation opposite` side wall, eachof said. reservoirs ycommunicating with the rotor chambers .by a.plurality of ports, andv a transposable. valve` to cooperate with oneof said openings in the lubricant chamber formed in the side ofsaid '770motor casing which isaccessible, said valve being adapted to cooperatewith one of the openings of another lubricant chamber when the otherside of the mot-or casing is accessible.

y 5. In a pressure fluid motorr having an 'in- 575 vertible casingpresenting parallel plane top and bottom surfaces upon either of whichthe motor may be supported during operation, the height of the motorbeing only that necesw sary for its power Aproducing function, a 330pair of intermeshing rotorshousedin said chamber whose peripheriesextend to points. closely adjacent said plane surfaces and means forsupplying lubricant to said rotor chambers in either position of themotorcomprisinga plurality of'lubricant reservoirs each having aplurality of openings. communicating with the rotor chambers one ofinvertible casinghavingnparallel plane 'top andbottom` surfaces uponeitherV of which and means for lubricating said motor comprisingfa'plurality of lubricantreservoirs disposed Vin each ofthe opposite sidewalls of the casing and within the vertical limits of said planesurfaces, one ofsaidreservoirs on each side having means for `supplyinglubricant to the motor when the latter is supported on one of said planesurfaces, and a second reservoir on that side having vmeans forsupplying a "lubricant to the motor when it is supported `H0 Y onV theother of said plane surfaces. the overall height of said motor beingonlyv "2o ing and disposed inthe space between said l Y rotors `onfoneside of the mesh line, said inlet 4passage also. Vhaving an 4angledportion through. which fluid is supplied directly to .tliei.,otois,` athrottle valve'in said inlet ypassage adjacent said angled portion, anda valve operating member mounted in the casing inthe space between therotors at thesame side of said mesh line and arranged wholly withinthe`vertical limits ofthe anotor casing and eiitending to the other end ofthe motor.

8. in a machine, apressure iuid motor constructed accoreing to claim 7wherein said valve operating element is in axial alinement with saidlongitudinally extending passage and operable from the end of saidcasing.

9. ln a machine, a pressure fiuid motor comprising a casing havingsubstantially piane unbroken top and bottom w=lls, intermeshing rotorsdisposed in said casing in the same horizontal plane, the height ot saidmachine being substantially equal to the outer diameter ot' one of saidrotors plus twice the required thickness of the motor casing, saidcasing having an inlet connection at one. end ot the motor, a passageextending longitudinally ot the casing from said connection and disposedin the space between said rotors at one side ot 't ie mesh line, a portleading from said passage to the mesh line of' said rotors locatedcentrally ot the rotors, and means arranged entirely ithin thexf'erticalliinits of said motor casing for controlling iiuid flow tosaid motor including a vlve in said passage adjacent said port, and avalve operating rod e\tending through said casing to one end thereof andmounted in the space between said rotors.

l0. ln a machine, a pressure fluid motor constructed according to claim9.j wherein said longitudinally extending passage and said valveoperating rod are located between parallel planes determinedrespectively by the ailes oit' said rotors and by common tangouts tosaid rotors at one side oi said aries.

l1. In a machine, a pressure fluid motor comprising a casing having apair of inten meshing rotors disposed therein and verti V:al side wallsarranged parailel to the rotor axes, the height of said machine beingonly that requisite for the rotors and top and bottom walls o1c thecasing, and exhaust passages formed in the side "alls of said casing andopening directl)T to atmosphere through said side walls, said exhaustpassages being formed to constitute return bends to form a trap in eachexhaust passage.

12. ln a motor, an invertible low compact motor frame presentingparallel plane top and bottom surfaces upon which the frame is adaptedto be selectively supported during its operation, the height of saidmotor trame being only that requisite for the power producing elementsof the motor, said frame having parallel overlapping bores intersectingat the longitudinal vertical center ot the motor7 and motor exhaustchambers at the ends ot said bores, parallel intermeshing toothed rotorsarranged in said bores, means for supplying fluid to said motor to acton the teeth ot said rotors comprising an inlet connection at the end ofsaid frame and a passage extending longitudinally through said frame tothe central portion of the rotors, and exhaust passages leading fromsaid exhaust chambers to the atmosphere including passages extendinglaterally from said rotor chambers on both sides of the frame andopening through the sides of said frame, said supply and er1- i liaustpassages being so arranged within thel vertical limits of said framethat the latter may be supported in either of its inverted positionswhile. permitting supply oi" fluid to said motor and tree exhaust fromthe sides ol' said motor.

13. ln a motor, the construction specified in claim l2 wherein there isfurther provided lubricating means for therotors including lubricantreservoir means, and means 'for conducting lubricant therefrom to saidrotors operative irrespective of the position in Which said motor issupported.

lli. ln a pressure lluid motor, a plurality of intermeshing rotorsrotatable on parallel axes, each or said rotors comprising a shafthaving a central portion of larger diameter than the end portions toform shoulders therebetween, a plurality of rotor sections mounted onsaid central portion, and locking elements removably secur d directly tosaid rotor sections and engaging said shoulders for holding said rotorsections on said shafts.

MORRIS l. HLMES.

